Assigwob



Aug. 7, 1928. 1,679,913

L. H. MoRRlLL TURBINE CONSTRUQTION Filed March 5, 1927 2 Sheets-Sheet l1%- QO N US @s f d@ Aug. 7, 192s.

- L.. H. MORRILL TURBINE CONSTRUCTION Filed March 5, 1927 2 Sheets-SheetPatented Aug. 7, 1928A.

ffumrso STATES Luana PATENTOFFICE.

"LEWisHAMORRILL, `or HARVEY; ILLINOIS, assrenoa Torrita enna COMPANY, orHARVEY, ILLINOIS, A oonronarrou OF rLLINOrs.

i TURBI-NE CONSTRUCTION.

`Application led March 3, 1927.

considerable attention, and in the turbine constructions which have been1n general use heretofore, it has usually been necessary to remove a.comparatively large portion of Athe turbine casing in order to obtainaccess to such blades. c c

1Itisaccordingly'an object of this invention to provideaturbineconstruction where in` only a comparativelysmall part of the`turbine casing need be removed to obtain access to the return blades ofthe turbine. -fMore speciically, `it is anobject of this inlvention toprovide a turbine "construction in `which the return blades oftheturbine are `so mounted that they .may be removed with 1 i ai maximum ofconvenience from a comparatively small opening.

Further and more specifically, it is an ob- ,ject of this invention `toprovide a turbine construction in which -asmall opening and removableclosure therefor is providedv ad- Ajacent .Y the return blades throughwhich opening access to the said blades may be attained.

`Still more specifically, it is an object of this invention `to providein connection with the said opening, a mountingfor said return bladesembracing outwardly removable retaining means accessible through 'saidOpens ing for facilitating assembly or removal `of said blades throughsaid Opening. p `Other and further objects of this inven- Ation will beapparent` as the same'becomes lbetterunderstood `from an examination ofthespeeiiication land claims in connection with the accompanyingdrawings illustrating preferred embodiment, in which,

Fig. 1 is a longitudinal fragmentary elevational view of the exterior ofa turbine housing formingllapart of a turbine generatorfsea `*Fig isa`fragmentary"sectional view takenlonthe line 22 Of Fig. land havingSerial No. 172,292.

i parts removed to show the character of the mountmg for the returnblades,

Fig. 3 is an enlarged fragmentary View taken at the line 3-3 of Fig. 2,c

Fig. 4 is an enlarged fragmentary sectional View taken at the line 4*-4of Fig. 2, and

Fig. 5 is an enlarged fragmentary view taken at the line 5--5 of Fig. 2.

Referring to thedrawings more particu larly, numeral 1 indicatesgenerally the housing of the turbine which, in this instance, forms apart of a turbine generator set, the generator housing (not shown)joining thesaid housing l `at the right, as viewed in Fig. l. `Thehousing l is constructed of aligned cylindrical sectiOnsQ and 3 which`are joined together and an end or cover section i which closes the end"of the section 3 The latter section Opposite said section 2. 2 is castwith a wall 5 closing the end opposite the section 3. `A turbine wheel 6and shaft therefor 7 is `mounted within; the housing l in `any suitablemanner.

The turbine wheel.` 6, according to `this illustration, is provided atthe side thereof and-along its outer periphery with circumferentiallyarranged buckets or blades S, said buckets extending axially from the side of said Wheel and being reinforced by suitable rings 9 connected tothe ends of the buckets. Each of the buckets 8 is provided with -a 4steml0 which extends through `the `wheelG and is upset at the side ofsaidwhecl oppositeto the bucket to retain the latter. VThe wheel 6, inorder that the buckets or blades 8 may be su'l'liciently spacedtherefrom to permit the return. buckets to entend beneath said buckets8, is provided with an annular shoulder ll. at its peripheral edge onwhich said buckets 8 are mounted.

The Wall 5 of `the section 2 is provided on its inner side with anarcuate ledge l2 which is provided as vieivcd in Fig. 5 withpcripherally spaced lugs 13 on which is mounted a removable mount la ofthe return buckets or `blades 15. The mount `lli is provided at itslower edge with an arcuate flange having a pair of peripherally spacedretaining gated heads (notshown) to facilitate operationand are`opera-ble by means of a tool `members in the form of screws 3 6therein,

Which may be inserted radially with respect to thehousing 1 throughranopening 17 in Y. the periphery of the section 2 opposite the mount 14.The opening 17 need be no larger v.than that necessary toreceivethevmount 14 j therethrough.

Steam is directed to the buckets 15fby a Lnozzle'18 mounted at asuitable angle in the section@ at one side of said opening 1 7. Asuitable control valve 19 communicating at one side thereof With apassage 20 which in turn communicates VWith a source of steam Ysupply 21Vis adapted to deliver steam through a l passageY 22,' communicatingwith the Votheruside of said valve,to said nozzle.

. The openingV 17 is providedjwith a closure plate 23 which inAthisinstance is shapedto provide a threaded opening therein forming anexhaust outlet 24. The plate 23 is mounted upon a suitable shoulder 25and is held on 1 said'shoulder by bolts 26.' Y

It vWill bevobvious that by reason of the re- 'movable mount lll'whichmay be removed throughthe opening 17v after the closure plate 23has beenremoved, access to the tur- `-b ine'blades is greatly facilitated. iI1"'am.aware that many changes may be Y made Without departingV from theprinciples of this invention, and I do not Wish to be limited to thedetails shown and described.

l1. I-n a'turbineconstruction, a casing, a turbine Wheel mountedvtherein, saidv casing havingan opening and closure therefor adjacentthe'peiiphery of said Wheel, and return .buckets Vand mounting thereforWithinf l said casing, said-mounting including means turbine Wheelmounted therein, said casing` y.accessible through said opening forpermitting the vremoval of said buckets.

Y 2. In a turbine construction, a casing, a

having an opening and closure therefor ad- Y jacent the periphery ofsaid Wheel and return buckets'mounted therefor within said casing,movaible means accessible through said opening for permitting theremoval of said j buckets. f

3.7In a turbine construction, va sectional casing, turbine Wheel mountedtherein, said casing having an opening in one of the Vv"sections thereofanda closurey plate for said ',opening, said' opening being adjacent thej' periphery of j said Wheel, return buckets f mounted Within saidcas1ng,'and a mounting therefor including means accessible throughpermitting the removal of saidfcasing having an opening in one of the l*sections lthereof anda closure plate for said opening,said opening beingoppositethe pe- .riphery of said Wheel, return buckets vrmounted 'Withinsaid casing,iand a mountsaid mounting including radially-l ing thereforincluding radially movable means accessible through said opening forpermitting the removal of said buckets.

5. In a turbine construction, a casing, a turbine wheel mounted therein,said wheel having axially extending buckets circumfercntially arrangedthereon, said casing j having an opening and closure therefor adjacenttlie periphery of said wheel, and return buckets and mounting thereforwithin said casing, the return buckets being arranged adjacent the innerperiphery of the turbine wheel buckets, the mounting for said returnbuckets including means accessible through said opening for permittingthe removal of said return buckets.

6. In a turbine construction, a casinga lturbine Wheel mounted therein,said Wheel having axially extending buckets circumfereiitially arrangedthereon, said casing having an opening and closure therefor adjacent theperiphery of said wheel, and return buckets removably mounted Withinsaid casing and arranged adjacent the inner periphery of the Wheelbuckets, the mount for said return buckets having radially operableretaining means accessible through said opening.

7. In a turbine construction, a easing, a turbine Wheel mounted thereinand having buckets thereon, said casing having an opening and closuretherefor adjacent the pe riphery of said Wheel,rreturn buckets andmounting therefor within said casing, said mounting including meansaccessible through said opening for permitting the removal of saidreturn buckets, and a nozzle mounted `-in said casing at one side ofsaid opening and adapted to direct steam to said first buckets.

8. In a turbine construction, a casing, a turbine Wheel mounted thereinhaving bucketsthereon, said casing having an opening and closuretherefor adjacent the periphery of saidvvvheel, return buckets andmounting therefor Within said casing, said mounting including radiallymovable means accessible through said opening for permitting thercinoval of said return buckets, and a nozzle mounted in said casing atone side of said opening and adapted to direct steam to said firstbuckets.

9. In a turbine construction, a casing, a turbine Wheel mounted therein,said casing having an opening and closure therefor adjacent theperiphery of said `Wheel, said opening being adapted to expose arelatively 'small part of said periphery, and return blades and mountingtherefor Within said casing, said mounting including means accessiblethrough said opening for permitting the removal of said blades. f

10. In a turbine construction, a casing, a turbine Wheel mountedtherein, said casing having an opening and closure therefor adjacent theperiphery of said wheel, said opening being adapted to expose arelatively small part of said periphery, and return blades andinounting` therefor Within said casing, said mounting including radiallymovable means accessible through said opening' for permitting theremoval of said blades.

ll. A turbine construction comprising a 10 rotatable turbine Wheelprovided With peripheral buckets, removable return bucket-s adjacentsaid Wheelbuckets, a casing surrounding' said Wheel and providedradiallT of the Wheel With an opening through which access to said wheeland return buckets may be obtained, and a removable closure for saidopening.

In, Witness of the foregoing, I ailix my signature.

LEWIS H. MORRILL.

